A Turn-On Near-Infrared Fluorescent Probe for Determination of Fe3+ and Antioxidant Capacity of Dark Teas

被引：2

作者：

Wang Zhen-Rui ^{[1
]}

Qi Feng-Pei ^{[1
]}

Luo Miao ^{[1
]}

Cao Yi-Ming ^{[1
]}

Liu Hong-Tao ^{[1
]}

Su Jian-Ke ^{[1
]}

Zhang Chang-Qing ^{[1
]}

Long Li-Ping ^{[1
]}

Liu Chang-Hui ^{[1
,2
]}

机构：

[1] Hunan City Univ, Coll Mat & Chem Engn, Hunan Prov Key Lab Dark Tea & Jin Hua, Yiyang 413000, Peoples R China

[2] Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

来源：

CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2019年 / 47卷 / 01期

基金：

湖南省自然科学基金; 中国国家自然科学基金;

关键词：

Ferric ion; Cysteine; Near-infrared probe; Dark teas; Antioxidant capacity; HIGHLY SELECTIVE DETECTION; COLORIMETRIC SENSORS; IRON; GLUTATHIONE; RECOGNITION; CYSTEINE;

D O I：

10.19756/j.issn.0253-3820.181121

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel quinoline-based cyanine derivative of CyQ was facilely synthesized by the condensation reaction of 4-methyl quinoline and dialdehyde, and its structure was characterized by H-1 NMR and HRMS-ESI. Then, the target compound CyQ-cysteine (Cys) was obtained by halogen-mercapto nucleophilic substation reaction and then rearrangement reaction between CyQ and Cys. The results showed that ferric ion (Fe3+) could efficiently cause the fluorescence enhancement of CyQ-Cys, and the fluorescence intensity was linear with the Fe(3+ )concentration in the range of 40-300 mmol/L with a regression equation of y =1.0619x + 0.01355 (R-2 = 0.9910) and a detection limit of 10.4 mu mol/L ( S/N = 3). In addition, by virtue of the excellent reductive properties of dark teas towards Fe3+, a NIR fluorescent method for assaying antioxidant capacity of dark teas was constructed by Fe3+-mediated off-on strategy.

引用

页码：112 / 118

页数：7

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